Update gallery.yml

Added Chris von Csefalvay's website ref.

Author: chrisvoncsefalvay

docs/gallery/gallery.yml

@@ -126,6 +126,11 @@
       href: https://www.mm218.dev/
       code: https://github.com/mikemahoney218/mm218.dev
       thumbnail: websites/websites-mike-mahoney.png
+    - title: Chris von Csefalvay
+      subtitle: personal website & blog
+      href: https://chrisvoncsefalvay.com/
+      code: https://github.com/chrisvoncsefalvay/chrisvoncsefalvay.github.io
+      thumbnail: websites/websites-chris-von-csefalvay.png
     - title: ForBo7 // Salman Naqvi
       subtitle: personal site + blog + works
       href: https://forbo7.github.io